A Huntington listing with a legal accessory apartment usually leads with the number. Two thousand a month in rental income, maybe more, folded into the pitch before the square footage. What almost never makes it into the listing description is that the apartment's legal status has a clock on it, and the clock does not automatically reset in the buyer's name when the deed does.
Under Town of Huntington code, an accessory dwelling unit permit is defined as a conditional use tied to a temporary special use permit, not a permanent feature of the house the way a finished basement or a new roof would be. It is granted at a Hearing Officer's discretion, reviewed by the Zoning Board of Appeals, and issued for a term. That distinction matters most at the exact moment a house changes hands, which is usually the moment nobody is looking at it closely.
A Permit, Not a Feature
Huntington's Accessory Dwelling Unit Bureau, which operates out of Town Hall, processes these permits on a two-year cycle. An owner-occupied permit runs for two years at a time, with a $500 fee due at renewal for each two-year period the permit stays active. A non-owner-occupied permit, where one still exists from before the rules tightened, renews at $350, and moving a non-owner-occupied permit into owner-occupied status costs another $500.
Every renewal requires a full inspection, and "full" means full. The code gives Town inspectors the right to access the attic, basement, and garage, not just the accessory unit itself, and if the inspector cannot get in, there is a $75 fee for the missed access. This is not a drive-by check. It is the kind of inspection that assumes the house's paperwork should match its physical reality, and it happens on a schedule regardless of who owns the house that week.
The town's own councilwoman addressed the value side of this directly when the current rules were being debated. Citing National Association of Realtors data, she noted publicly that "ADUs can add 35% to a home's value", which is the number sellers understandably like to repeat. The same letter also confirmed the less-repeated half: adding or finishing a legal ADU tends to trigger a reassessment from the Town Assessor's office, and it can bump the property's garbage pickup rate. The upside is real. So is the maintenance cost of keeping it real.
What Changes When Title Transfers
Town code lists transfer of title among the events that end a permit's current term, alongside the simple passage of two years. The clearest illustration of how this plays out in practice sits in the code's own provision for the Take Back the Blocks Program, where a nonprofit or the Huntington Community Development Agency sells a formerly distressed property to a new owner. Even there, in a program built specifically to keep these units legal through a sale, the code requires the new owner to file a fresh application to transfer the permit. The first year's fee can be waived under that program. The filing requirement is not.
| Seller's Position Before the Sale | Buyer's Position After Closing | |
|---|---|---|
| Permit status | Valid, active special use permit | Must be applied for again in the new owner's name |
| Inspection | Only required at each renewal | Full-access inspection (attic, basement, garage) tied to the transfer |
| Fee | $500 per two-year renewal, owner-occupied | New application or transfer fee due before the unit is legally rentable under the new owner |
| Rental income | Counted for years under the existing permit | Not usable for underwriting until the transfer is approved |
For a private resale outside that program, the practical takeaway is the same shape: a buyer should not assume the ADU and its income transfer with the keys. Confirming the permit's actual status, and who is on record with the ADU Bureau as the applicant, is a step that belongs before closing, not after.
Rules That Are Stricter Than the Neighbors'
Huntington's code is also more restrictive on the physical form an ADU is allowed to take than several nearby towns. Units have to be built inside the existing structure of the main dwelling. A converted garage apartment or a backyard cottage, the kind that other Long Island towns are starting to permit, does not qualify here. Basement and cellar apartments have been closed to new applications since July 16, 2019, meaning a unit built in a lower level today has to have been permitted before that date to remain legal.
New applications also have to clear a saturation check. An ADU cannot be approved if it would push the density of accessory units above 10 percent within a half-mile radius of the property, which means a buyer eyeing a house for its ADU potential should ask early whether the surrounding block has room left under that cap. Parking has its own floor too: two off-street spaces for a one-bedroom accessory unit, three for a two-bedroom, all required to be paved.
For comparison, Southold removed its requirement that an accessory apartment be built inside a permanently existing structure back in April 2026, opening the door to detached units there. Huntington has made no equivalent move. A homeowner comparing the two towns on ADU flexibility is comparing two different regulatory postures, not two versions of the same rule.
The Underwriting Math
This is where a mortgage-banking lens earns its keep. A lender evaluating a buyer's application will generally only count accessory apartment rent as qualifying income if the permit is currently valid, documented, and in the applicant's name, not a prior owner's. If a Huntington sale closes while the ADU permit's transfer is still pending, that rental income is not something the buyer's file can lean on yet, even if the tenant is still in place and paying on time.
For a move-up buyer counting on that rent to make the monthly payment work, or an investor underwriting a Huntington property specifically for the accessory income, this is the kind of detail that belongs in the financing conversation from the first pre-approval call, not something discovered during underwriting. Homeowners who want to build a new unit or bring an existing one into compliance have a funding option worth knowing about too: the Town's Plus One ADU Program, run through the Huntington Community Development Agency alongside the Long Island Housing Partnership, offers grant support to income-qualifying homeowners creating or upgrading an accessory apartment.
Before You Write the Rental Income Into an Offer
A short list worth working through before a Huntington accessory apartment shows up in a financing package or a listing price:
- Call the Accessory Dwelling Unit Bureau at Town Hall directly and confirm the permit's current expiration date and whose name is on it.
- Ask whether the property's half-mile radius still has room under the 10 percent saturation cap, in case the unit ever needs to be reapplied for.
- Budget for the transfer application and the possibility of a property tax reassessment tied to the unit.
- Plan the timeline around a full-access inspection, including the attic and garage, not just the unit itself.
- Confirm with your lender, before you write an offer around the rental number, whether that income can be counted pre-transfer or only after.
Frequently Asked Questions
Does a legal accessory apartment automatically transfer to a new owner when a Huntington home sells? No. Town code treats transfer of title as one of the events that ends a permit's current term, and even the program built to preserve continuity through a sale, Take Back the Blocks, requires the new owner to file a transfer application rather than inheriting the permit automatically.
Can a basement apartment still be legalized in Huntington today? Only if it was permitted before July 16, 2019. New applications for basement or cellar accessory units have not been accepted since that date.
Will adding an accessory apartment raise my property taxes? The Town Assessor's office has confirmed that finishing a basement or adding a legal ADU tends to increase the assessed value, and with it the tax bill, since the improvement adds to what the home is worth on paper.
A Huntington accessory apartment can be a legitimate piece of a home's value and a legitimate piece of a buyer's financing plan. It just is not a fixture that rides along in the sale on its own. Getting the permit's status confirmed, and the transfer paperwork moving, before the closing date arrives is the difference between an accessory apartment that pays for itself and one that sits vacant while the file works its way through Town Hall.
If you are pricing a Huntington listing that includes an accessory apartment, or underwriting a purchase where that rental income needs to hold up, the team at Kieran Rodgers coordinates the listing strategy and the financing conversation together, so the permit status gets confirmed before it becomes a problem at the closing table. Schedule Your Private Consultation to talk through what a specific Huntington property's ADU situation means for your price, your timeline, or your loan file.
